Copying-machine.



E. LIGHTENSTE COPYING MAUHIN APPLICATION FILED NOV. 08. 996,418, Patented June 27, 1911. I

ran sra'rns PATENT orrion.

EDMUND LICI-ITENSTEIN, OF BERLIN, GERMANY.

COPYING-MACHINE.

To all whom it may concern:

Be it known that I, EDMUND LIOHTEN- STEIN, a subject of the German Emperor, residing in Berlin, Germany, have invented new and useful Improvements in Copying- Machines, of which the following is a specification.

In the drawings, Figure 1 is a longitudinal sectional view of the invention, and Fig. 2 is a similar View of a modification.

In copying machines with water-tanks, it is essential that the pressure applied for squeezing moisture from the paper is greater than that applied for copying, in order that, during the copying operation, no water liable to smudge the writing is expressed from the paper. For this purpose, the rollers must be suitably adjusted, and it is usual to use two eccentrics or levers, by means of which the same efiect can be obtained with one eccentric. Another method consists in arranging the rollers 5, 6, and 7 in such relation to each other that a spring 9 or the like thrusting the roller 6 against the rollers 5 and 7 produces greater pressure between the moisture-expressing rollers 5 and 6 than between the rollers 6 and 7 where the copying takes place. The two angles a, and a, must, of course, be unequal.

Fig. 2 .shows a construction with four rollers, where copying is effected in' two places. The pressure between the rollers 5 and 6 is also in this case greater than between the rollers 6 and 7 and 7 and 8. The pressure between the rollers 7 and 8 is increased by the weight of the rollers 6 and 7. To prevent the application of greater pressure between 7 and 8 than between 5 and 6,

Specification of Letters Patent.

Application filed November 12, 1908.

Patented June 27, 1911.

Serial No. 462,351.

the axis of the roller 8 is displaced, to the extent of the angle B, from the plane containing the axes of the rollers 6 and 7.

I claim:

1. A copying machine including a moisture expressing roller, a copying roller adjacent the moisture expressing roller, and a spring pressed roller in engagement with each of the first named rollers, said rollers being so disposed that the pressure of the spring pressed roller on the moisture expressing roller exceeds the pressure exerted byuthe spring pressed roller on the copying ro er.

2. In a copying machine in combination with a cylinder, and a platen arranged adjapressure that said pressure roller exerts against said cylinder.

In witness whereof I have hereunto signed my name this 22nd day of October 1908, in the presence of two subscribing witnesses.

EDMUND LICHTENSTEIN.

Witnesses HENRY HASPER, WOLDEMAR HAUPT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

